Caster



E. L. WHITE CASTER Oct. 12 192e. l 1,602,631

Filed Jan. 17 1925 Z 6 Y y WQ of,

r BY l OLV M/'ZWATTORNEY Patented Oct. 12,- 1926.

EDWARD 1 WHITE, or 'ranas-LY, Naw maaar.

(EASTER.

Application ileflv January 17,` 1925. Serial No. 3,305.

My invention relates tol improvements in casters and the objects o'f my improvements are to provide a strong, light, durable caster which can be cheaply and easily manu- I factured and can be subjected to severe shocks and strains without injury.

The other objects omy invention will be more fully set forth in the following specification:

In the accompanying drawings Figure 1 is a side 'elevation of my caster.

Figure 2 lis a section on the line AA of Figure 1. v

Figure 3 is a plan view.

Similar numerals'designate similar parts throughout the respective views.

The casters heretofore in use and desi ed for carrying heavy loads have usually en made of cast metal parts and consisted of a' top plate or load carrying member, a wheel carrying member, and a retaining plate secured by a king bolt to the top platewith ball bearings between the retaining plate and' wheel carrying member and between the wheel carrying member and the top plates.

' Such structures where the casters were attached to the trucks or other devices werev frequently subjected to heavy strains and shocks because of the uneven surface over sometimes' fractured the top plate around the head'of the king bolt or sheared the up set end of the king bolt and allowed the members to fall apart. Usuall the continued wear caused the parts to and in time produced suicient play to permit the balls to fall out. Generally casters of this construction did not possess suiiicient strength or durability to. render them suitable for the purposes for which they were used. Such casters were also heavy and expensive to manufacture. My improved caster is constructed' of` stamped metal without bolts, rivets or other parts which are liable which the caster was moved. Such strains.

come loose to be fractured or destroyed by the severe .strains and shocks to which they must and lip with the concave surface of the rib 8 in the lip 9 serve as a race for the beari balls 14 which take up the side thrusts to which the caster is subjected. Between the upper face ofthe rib 8 and the flower face of the rib 4 are mounted spool like concave rollers 15, the ribs being-so formed as to retain the rollers 15 in position on their races and permit the wheel carryin mem 75 ber to turn freely about the load aring member. f

In order to protect the bearings from dust and dirt, I provide a ring 16 .which is welded at 17 to the top plate 2. Depending from the cylindrical portion of the wheel carry lng member 6 are ears 18 whichA are bored at 19 to receive the, axle shaft 20 on which is mounted a sleeve 21 which serves to brace and spacethe ends of the ears from each other when the nuts 22 on th'e ends of the axle shaft 20 are seated against the outer surface of the ears. Rollers 23 are mounted around the sleeve 21 and within a sleeve 24A which is tightly fitted in the hub 25 of ythe 90 wheel 26. Washers 27 of leatheror other suitable material for retaining lubricants in the bearingsare mounted on the sleeve 2 1v and within the-sleeve Washers 28 are mountedvon the sleeve 21 and are of a diameter to fit accurately the bore of the blib` 25. Washers 29 are also mounted on each end of lthe sleeve 21, these washers bein y of a greater diameter than the diameter o the sleeve 24. Y 100 Having described my invention, I claim 1. VA caster comprising in combination a top 'plate of sheet metal, a. de resse'd rib stamped therein, a sheet metal w eel carrying member having an inwardly turned lip, an upwardly convex rib formed in said lip, spool like bearin rolls mounted between said ribs, a retaining member secured to said top plate, and rotatable bearing lmeinbers mounted between said retaining memer and said lip on said wheel bearing mem- 2. A caster comprisin in combination a frusto conical retaining member having a topplate of sheet metal aving a depressed neck projecting into the centralaperture of l0 central portion, a central aperture, a desaid loadbearing member and Welded therepressed rib concentric to saidcentral aperto and rotatable bearing members between l ture, a sheet metal Wheel carrying member said retaining member and said lip 0n said having an inwardl turned lip, an upwardly wheel carrying member. convex rib forme in said lip, spool like Jan. 16,1925. bearing rolls mounted between said ribs, a EDWARD L. WHITE. 

